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Write an accurate concluding statement for the following hypothesis tests.
(a) You claim that the mean volume of all 12 ounce cans of Fizzy Pop is less than 12 ounces. After analyzing the data and performing a hypothesis test, you fail to reject the null hypothesis.
(b) Fizzy Pop claims that most 12 ounce cans of Fizzy Pop contain more than 12 ounces. After analyzing the data and performing a hypothesis test, you reject the null hypothesis.
(c) You claim that the average speed of cars going down a certain stretch of highway is 72 mph. After analyzing the data and performing a hypothesis test, you fail to reject the null hypothesis.
a doctor is trying to determine whether her patients prefer a male nurse or a female nurse. after asking 25 male
in the following problem check that it is appropriate to use the normal approximation to the binomial. then use the
Recognize and describe potential threats (up to 3) to internal validity.
A random sample of 15 college graduates revealed that they worked an average of 5.3 years on the job before being promoted. The sample standard deviation was 1.2 years. Using the 0.95 degree of confidence, what is the confidence interval for the p..
If Accrotime guarantees full refund on any defective watch for 2 years after purchase, determine percentage of total production will company expect to replace?
About 72% of dog owners buy holiday presents for their dogs. Suppose n = 4 dog owners are randomly selected. Find the expected number of persons, in the sample, who buy their dog holiday presents.
Determine whether each of the following is an experiment or an observational study. Also identify the explanatory and response variables.
The number of degrees of freedom associated with the t test, when the data are gathered from a matched pairs experiment with 13 pairs, is:
suppose a garage has 2 gates one with poisson distribution of 3 carshour and the other gate 4 carshour. what is the
Researchers designed a questionnaire to identify compulsive buyers. For a sample of consumers who identified themselves as compulsive buyers, scores have a mean of 0.83 and a standard deviation of 0.24.
The winning team's scores in 9 high school basketball games were recorded. If the sample mean is 9.8 points and the sample standard deviation is 0.15 points, find the 98% confidence interval of the true mean.
For a normal population with u. = 80 and a = 20 which of the following samples is least likely to be obtained?
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